You can do it yourself, but if it's in an awkward place it could hurt since you need a take them out at a certain angle.
http://flylib.com/books/en/2.569.1.25/1/
Figure 1710, the last one should give you an idea of what you are working with.
http://flylib.com/books/en/2.569.1.25/1/
Figure 1710, the last one should give you an idea of what you are working with.